I've never found any "medical" clubs in my area, but I would think that they provide more standardized product(s).

I've also heard that some people prefer Indica over Sativa for various medical conditions, and vice versa.

If you don't know what you're doing I guess that the best thing is to have hybrids, or both, lol.

I'd be perfectly happy with some good black hash (i.e. Nepanese) - but that's been unavailable (to me at least) for many years.